SECTION 3.10
189
File Specifications
3.10.5 Collection Items
Beginning with PDF 1.7, a
collection item dictionary
contains the data described
by the collection schema dictionary for a particular file in a collection (see
dictionary.
TABLE 3.45 Entries in a collection item dictionary
KEY
TYPE
VALUE
Type
name
text string,
date,
number or
dictionary
(Optional) The type of PDF object that this dictionary describes; if present, must be
CollectionItem
for a collection item dictionary.
(Optional) Provides the data corresponding to the related fields in the collection dic-
tionary. If the entry is a dictionary, then it is a collection subitem dictionary (see
The type of each entry must match the type of data identified by the collection field
dictionary (see Table 8.8 on page 591). For example, if the corresponding collection
field has a
Subtype
entry of
S
, then the entry is a text string.
A single collection item dictionary may contain multiple entries, with one entry rep-
resenting each key (see Example 8.3 on page 593).
Other
keys
chosen by
producer
A
collection subitem dictionary
provides the data corresponding to the related
fields in the collection dictionary, and it provides a means of associating a prefix
string with that data value. The prefix is ignored by the sorting algorithm.
TABLE 3.46 Entries in a collection subitem dictionary
KEY
TYPE
VALUE
Type
name
text string,
date, or
number
text string
(Optional) The type of PDF object that this dictionary describes; if present, must be
CollectionSubitem
for a collection item dictionary.
(Optional) The data corresponding to the related entry in the collection field dictio-
nary (see Table 8.8 on page 591). The type of data must match the data type identified
by the collection field dictionary. Default: none.
(Optional) A prefix string that is concatenated with the text string presented to the
user. This entry is ignored when a PDF viewer application sorts the items in the col-
lection. Default: none.
D
P